diff options
| author | imp <imp@FreeBSD.org> | 2004-06-28 03:16:32 +0000 |
|---|---|---|
| committer | imp <imp@FreeBSD.org> | 2004-06-28 03:16:32 +0000 |
| commit | c83f7f6bdcdacf5908121e3c3e902febfcdffca7 (patch) | |
| tree | 9a1b95130c8ab26b23e50c5dc1825859aee74d05 /sys/i386 | |
| parent | 16d11e08eb148af997d3bc1d5799a947aa9a71fb (diff) | |
| download | FreeBSD-src-c83f7f6bdcdacf5908121e3c3e902febfcdffca7.zip FreeBSD-src-c83f7f6bdcdacf5908121e3c3e902febfcdffca7.tar.gz | |
When opening /dev/io, preserve iopl properly. Otherwise, if you open
/dev/io multiple times, the first close remove the privs.
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/mem.c | 2 | ||||
| -rw-r--r-- | sys/i386/include/proc.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/sys/i386/i386/mem.c b/sys/i386/i386/mem.c index 379b59c..c129feb 100644 --- a/sys/i386/i386/mem.c +++ b/sys/i386/i386/mem.c @@ -98,6 +98,7 @@ mmclose(struct cdev *dev, int flags, int fmt, struct thread *td) { switch (minor(dev)) { case 14: + td->td_proc->p_md.md_iopl = 0; td->td_frame->tf_eflags &= ~PSL_IOPL; } return (0); @@ -125,6 +126,7 @@ mmopen(struct cdev *dev, int flags, int fmt, struct thread *td) if (error != 0) return (error); td->td_frame->tf_eflags |= PSL_IOPL; + td->td_proc->p_md.md_iopl = PSL_IOPL; break; } return (0); diff --git a/sys/i386/include/proc.h b/sys/i386/include/proc.h index 5b2c286..810a8e5 100644 --- a/sys/i386/include/proc.h +++ b/sys/i386/include/proc.h @@ -52,6 +52,7 @@ struct mdthread { struct mdproc { struct proc_ldt *md_ldt; /* (j) per-process ldt */ + uint32_t md_iopl; /* process' iopl level */ }; #ifdef _KERNEL |
